JP2695094B2 - Lock structure between body and lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock structure for a main body and a lid, and more particularly to a main body and a lid which prevent incomplete fitting of a locking projection of the main body into a locking hole portion of the lid. Regarding lock structure.

[0002]

2. Description of the Related Art FIG. 4 shows a relay block body (hereinafter referred to as "main body") 1 to which a conventional lock structure described in Japanese Utility Model Laid-Open No. 64-39679 is applied and an upper opening 3 of the body 1. The lid 5 to be closed is shown. As shown in FIG.
The side wall 7 of the main body 1 is provided with a locking projection 21 having an upslope 9 inclined from the tip toward the side wall 7. Further, a lock portion 29 having a lock claw is formed on the side wall 27 facing the side wall 7.

On the other hand, the side wall 11 of the lid 5 has a locking projection 2
A flexible locking frame 15 that forms a locking hole 13 into which 1 is inserted and locked is provided. The locking frame 15 is formed into a rectangular shape by connecting a lower part of a pair of vertical frames to a lower frame 17, and a lower surface of the lower frame 17 has an inclined surface 19 formed on the inner side (side wall 11 side). Further, on the side wall 23 facing the side wall 11, a lock arm 25 that engages with a lock claw of the lock portion 29 of the main body 1 is projected.

In order to close the upper opening 3 of the main body 1 with the lid body 5, after fitting the lid body 5 on the upper opening 3 of the main body 1, the upper portion of the lid body 5 on the side wall 23 side is pressed, The lock arm 25 is locked to the lock claw of the lock portion 29 of the main body 1.
In this state, the side wall 11 side of the lid 5 is located on the side wall 7 side of the main body 1.
The lower frame 17 of the locking frame 15 is inclined with respect to the upside inclined surface 9 of the locking projection 21 projecting from the side wall 7 of the main body 1.
Is in contact with

Then, when the upper portion of the lid 5 on the side wall 11 is pressed, the lower frame 17 is slightly bent outward while the lower frame 17 is moved to the tip end on the upward slope 9 as shown in FIG. 5 (a). Slide toward. Further, when the upper portion of the lid body 5 on the side wall 11 side is pressed, the locking frame 15 bends further outward, and the inclined surface 19 of the lower frame 17 slides on the tip end of the locking projection 21.
When the lower frame 17 gets over 1, the locking frame 15 returns to its original shape by its elastic force and the lower frame 17 is positioned below the locking projection 21, as shown in FIG. 5B. As a result, the locking projection 21 is locked in the locking hole 13 and is in a locked state.

[0006]

However, the lid 5
When the pressing on the upper part of the side wall 11 of the
As shown in (a), the tip of the locking projection 21 and the lower frame 1
Even though the upper end of the inclined surface 19 of 7 is in contact with the upper portion of the incomplete fitting state, it may be determined that the locking protrusion 21 is completely fitted into the locking hole 13. .

The locking projection 21 is inserted into the locking hole 13
When the locking projection 21 is removed from the locking hole 13 in the locked state, only the locking frame 15 is forcibly bent, and the locking projection 2
Since 1 is pulled out from the locking hole 13, there is a problem that the releasability of the locked state is very poor.

In consideration of the above circumstances, the present invention can prevent the locking projection from being incompletely fitted into the locking hole, and can easily pull out the locking projection from the locking hole. An object of the present invention is to provide a lock structure for the lid and the lid.

[0009]

In order to achieve the above-mentioned object, the present invention provides the locking projection so that the tip end is elastically deformed toward the closing direction of the lid to the main body and the side opposite to the closing direction. The lower end of the locking frame is formed into a flexible flat plate
Is provided on the periphery of the locking hole portion and is locked from the locking hole side.
An inclined surface for unlocking that descends toward the protrusion side, and
From the lower end of the locking frame toward the locking projection side,
Form a critical protrusion on the top where the locking slope is continuous,
The tip of the flexible locking projection is on the locking slope.
Slide over the critical convex portion to be inserted into the locking portion, and the tip end portion of the flexible locking projection is locked by the lock portion.
It is characterized in that it slides on the slope for releasing the brake , gets over the critical convex portion, and is pulled out from the locking hole portion.

[0010]

In the lock structure of the present invention, when the lid is pressed toward the main body after the flexible locking frame contacts the locking projection, the tip of the locking projection slides on the locking slope. It moves and elastically deforms. When the tip end of the locking projection gets over the critical convex portion, the elastic force of the locking projection restores its shape so that it slides on the lock releasing inclined surface, and the elastic force of the flexible locking frame also increases. In addition, the locking projection is inserted and locked in the locking hole. At this time, if the pressing operation of the lid body against the main body is stopped before overcoming the critical convex portion, the locking frame is pressed by the elastic force of the locking projection, and the lid body is disengaged from the main body. As a result, it is possible to easily recognize that the locking projection is in an incompletely fitted state in which the locking projection is not completely inserted and locked in the locking hole of the locking frame.

When the locking projection is pulled out from the locking hole and the locked state is released after the locking projection is inserted and locked in the locking hole, a flexible locking frame is used. In a state in which the lid is slightly bent toward the outside, that is, in a state in which the locking frame is bent toward the outside so that the tip of the locking projection rides on the inclined surface for unlocking, the lid is moved away from the main body. When pulled up, the tip of the locking projection elastically deforms in the opening direction of the lid from the main body and slides on the lock releasing inclined surface. Then, when the tip of the locking projection gets over the critical convex portion, the elastic force of the locking projection itself restores the shape so that the locking projection slides and the elastic force of the flexible locking frame also increases. In addition, the locking projection is pulled out from the locking hole. At this time, the locking projections slide on the locking inclined surface by the elastic force of the locking projections and the elastic force of the locking frame, so that the lid body is pushed up from the main body. Therefore, when removing the lid from the main body, bend the flexible locking frame toward the outside and place the tip of the locking projection on the inclined surface for locking. The lid can be easily removed from the main body because it is pushed up.

[0012]

Embodiments of the lock structure for the main body and the lid according to the present invention will be described below. FIG. 1 shows a main body 31 and a lid 35 to which the present invention is applied. The same components as those of the main body 1 and the lid 5 shown in FIG. 4 will be described using the same reference numerals.

As shown in FIG. 1, the locking projection 37 projecting from the side wall 7 of the main body 31 has a closing direction of the lid 35 to the main body 31 (hereinafter referred to as "closing direction") and an opposite direction of the closing direction. Toward the side (hereinafter referred to as the “opening direction”) 37
A is formed in a flexible flat plate shape so as to be elastically deformed, and has a substantially arcuate tip.

On the other hand, in the lower frame 17 of the flexible locking frame 15, the locking projections 3 are formed on the peripheral edge of the locking hole 13 from the locking hole 13 side.
A lock slope 19 that slopes downward is formed toward the 7 side. Further, the lock releasing inclined surface 30 is inclined upward from the lower end of the lower frame 17 of the locking frame 15 toward the locking projection 37 side.
Are formed. A critical convex portion 41 is formed at the top where the locking inclined surface 19 and the unlocking inclined surface 30 are continuous.

When the upper opening 3 of the main body 31 is closed by the lid 35, the lock arm 25 is first locked to the lock portion 29. In this state, the side wall 11 of the lid 35 has the main body 31
Slightly inclined with respect to the side wall 7 of the lower frame 17 of the locking frame 15.
The lower surface of the above contacts the tip portion 37a of the locking projection 37. From this state, as shown in FIG. 1B, when the upper part of the lid 35 on the side wall 11 side is pressed, the lower frame 17 is pressed to elastically deform the tip portion 37a of the locking projection 37 in the closing direction. It slides on the lock inclined surface 19. Further lid 35
Is pressed toward the main body 31 side, the tip portion 37 of the locking projection 37 is
a passes over the critical convex portion 41, and the inclined surface 39 for unlocking
Abut. When the tip portion 37a of the locking projection 37 comes into contact with the unlocking inclined surface 39, the elastic force of the locking projection 37 itself restores the shape and slides on the unlocking inclined surface 39, and The elastic frame causes the locking frame 15 to move toward the side wall 7 by its own elastic force. Thereby, the locking protrusion 3
7 inserts itself into the locking hole 13 and locks it.

Next, as shown in FIG. 2A, when the locking state in which the locking projection 37 is inserted and locked in the locking hole 13 is released, the locking frame 15 is slightly bent outward. When the lid 35 is pulled up in a direction away from the main body 31 in the empty state, the tip portion 37a of the locking protrusion 37 on the upper surface of the lower frame 17 is pulled out.
However, it elastically deforms in the opening direction and slides on the inclined surface 39. Then, the critical protrusion 41 is attached to the tip 3 of the locking protrusion 37.
When 7a gets over, the tip portion 37a of the locking projection 37 is
The elastic frame causes the shape to return toward the opening direction, and the locking frame 1
By the movement of the elastic force of 5 to the side wall 7 side, the lower frame 17
The front end portion 37a of the locking projection 37 moves to the lower portion of the lower frame 17 by sliding on the inclined surface 19 of.

As described above, in the lock structure of the present embodiment, by providing the critical projection 41 at the top where the locking inclined surface 19 and the unlocking inclined surface are continuous, the tip portion 37a of the locking projection 37 is formed. If the lower frame 17 is moved downward to such an extent that the tip portion gets over the critical convex portion 41, that is, if the lid body 35 is pressed toward the main body 31, the tip portion 37a of the locking projection 37 will have an inclined surface for unlocking. The locking frame 15 is pushed down by sliding on 39 and is inserted and locked in the locking hole 13 by its own elastic force. Therefore, it can be easily locked. Further, if the pressing operation of the lid 35 against the main body 31 is stopped before the tip portion 37a of the locking projection 37 gets over the critical convex portion 41, the locking frame 15 is pushed up by the elastic force of the locking projection 37. The incompletely fitted state in which the locking projection 37 is not completely inserted and locked in the locking hole 13 can be easily recognized. As a result, incomplete fitting of the lid 35 to the main body 31 can be prevented.

Further, since the tip end portion 37a of the locking projection 37 rides over the critical convex portion 41 while being elastically deformed, the locking frame 1
The amount of flexure of No. 5 can be reduced. Therefore, the locking projection 37 can be easily inserted into the locking hole 13, and the locking projection 37 can be easily pulled out from the locking hole 13. Further, in the state where the locking projection 37 is inserted and locked in the locking hole 13, the locking force is the same as the conventional one.

In this embodiment, the side wall 23 of the lid 35 is used.
Although the example in which the lock arm is formed in the main body 31 and the lock portion 29 is provided on the side wall 27 of the main body 31 is shown, the lock structure of the present invention can be applied to a structure in which the side wall 23 and the side wall 27 are connected by a hinge.

[0020]

As described above, according to the lock structure of the main body and the lid according to the present invention, the locking projection is made flexible so that the tip portion is elastically deformed in the closing direction and the opening direction. Since it is formed in a flat plate shape and the critical projection is formed on the locking frame, the tip of the locking projection can easily get over the critical projection only by slightly moving the locking frame upward or downward. . Therefore, it is possible to prevent the locking projection from being incompletely fitted into the locking hole and to easily pull out the locking projection from the locking hole.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main body and a lid to which a lock structure of the main body and the lid according to the present invention is applied.
(B) is an enlarged sectional view of a part of the side wall of the main body and the lid.

FIG. 2 is an enlarged view showing a part of the side wall of the main body and the lid,
(A) is sectional drawing which shows the state which the locking projection was inserted and locked in the locking hole, and (b) is sectional drawing which shows the locking projection in the middle of extracting from the locking hole.

FIG. 3 is a cross-sectional view showing a state in which a locking protrusion slides on an inclined surface of a lower frame of the locking frame.

FIG. 4 is a perspective view showing a main body and a lid to which a conventional lock structure of the main body and the lid is applied.

FIG. 5 is an enlarged view of a part of a side wall of a conventional main body and a lid, (a) is a cross-sectional view showing a state where a locking frame is in contact with a tip portion of a locking projection, and (b). FIG. 6 is a cross-sectional view showing a state in which the locking protrusion is inserted and locked in the locking hole.

[Explanation of symbols]

 3 Upper Opening 13 Locking Hole 15 (Flexible) Locking Frame 17 Lower Frame 19 Sloping Surface 21 Locking Protrusion 31 Main Body 35 Lid 37 Locking Protrusion 39 Sloping Surface 41 Critical Convex Portion

Claims (1)

(57) [Claims] 1. A locking projection projecting from a main body is inserted into a locking hole formed by a flexible locking frame formed on a lid.
In a lock structure that locks and locks the main body and the lid, the locking projection is flexible so that the tip end elastically deforms toward the closing direction of the lid to the main body and the opposite side of the closing direction. Of the locking frame, and is formed in a flat plate shape having flexibility.
Provided on the periphery of the stop hole portion, from the lock hole portion side to the lock protrusion side
And a locking slope that is downwardly inclined toward the lock and the locking frame.
Locking upward from the lower end of the lock protrusion toward the locking protrusion
Forming a critical projection on the top that is continuous with the slope for lock, and the tip of the flexible locking projection slides on the slope for lock.
Then, while overcoming the critical convex portion and being inserted into the locking portion, the tip end portion of the flexible locking protrusion releases the lock.
A lock structure for a main body and a lid, which slides on a slope for use, rides over the critical convex portion, and is pulled out from the locking hole portion.